AFTER many reports over the weekend that the site was not working for some users, we have established that we are being blocked by the adult content filter on the Internet Service Provider (ISP) Three.

Affected users get the message above, which does not make it clear that the site is being censored, but gives an erroneous message about the SSL certificate. This makes it look like a misconfiguration on our part, but this is not the case.
We have contacted Three to enquire exactly why TCW has been added to their adult content filter.
Three use the British Board of Film Classification (BBFC) guidelines, which you can find here.
TCW can appeal to BBFC to be unblocked by Three, and you can be sure that we are following this process. We have also registered the censorship with the Open Rights Group’s Blocked! website.
In the meantime, Three users may wish to reconsider their choice of ISP. Customers of Three can request that the adult filter be turned off by contacting customer services. A non-censoring ISP would be a good idea too – we can recommend Andrews and Arnold. A good VPN (Virtual Private Network) might be an idea too, if you would prefer that your ISP does not control the content you are able to access online. IVPN are great.
We will be tweeting @ThreeUKsupport and @ThreeUK to see what they have to say. It would be helpful if some of our readers could do this too.
If this can happen to TCW, it can happen to any site on the internet. Resist online censorship, for that is what this is.